133887085 has 4 divisors (see below), whose sum is σ = 160664508. Its totient is φ = 107109664.

The previous prime is 133887049. The next prime is 133887137. The reversal of 133887085 is 580788331.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 86359849 + 47527236 = 9293^2 + 6894^2 .

It is a cyclic number.

It is not a de Polignac number, because 133887085 - 2¹⁹ = 133362797 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13388704 + ... + 13388713.

It is an arithmetic number, because the mean of its divisors is an integer number (40166127).

Almost surely, 2^133887085 is an apocalyptic number.

It is an amenable number.

133887085 is a deficient number, since it is larger than the sum of its proper divisors (26777423).

133887085 is an equidigital number, since it uses as much as digits as its factorization.

133887085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26777422.

The product of its (nonzero) digits is 161280, while the sum is 43.

The square root of 133887085 is about 11570.9586897543. The cubic root of 133887085 is about 511.5792199666.

The spelling of 133887085 in words is "one hundred thirty-three million, eight hundred eighty-seven thousand, eighty-five".